Minimal two-band model of the superconducting iron oxypnictides

S. Raghu, Xiao Liang Qi, Chaoxing Liu, D. J. Scalapino, Shou Cheng Zhang

Research output: Contribution to journalArticle

377 Citations (Scopus)

Abstract

Following the discovery of the Fe-pnictide superconductors, local-density approximation (LDA) band structure calculations showed that the dominant contributions to the spectral weight near the Fermi energy came from the Fe3d orbitals. The Fermi surface is characterized by two hole surfaces around the Γ point and two electron surfaces around the M point of the two Fe/cell Brillouin zone. Here, we describe a two-band model that reproduces the topology of the LDA Fermi surface and exhibits both ferromagnetic and q= (π,0) spin-density wave fluctuations. We argue that this minimal model contains the essential low energy physics of these materials.

Original languageEnglish (US)
Article number220503
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume77
Issue number22
DOIs
StatePublished - Jun 11 2008

Fingerprint

Local density approximation
Fermi surface
Iron
Spin density waves
iron
Fermi surfaces
Fermi level
Band structure
Superconducting materials
Group 5A compounds
Physics
Topology
approximation
Brillouin zones
Electrons
topology
orbitals
physics
energy
cells

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

Raghu, S. ; Qi, Xiao Liang ; Liu, Chaoxing ; Scalapino, D. J. ; Zhang, Shou Cheng. / Minimal two-band model of the superconducting iron oxypnictides. In: Physical Review B - Condensed Matter and Materials Physics. 2008 ; Vol. 77, No. 22.
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Minimal two-band model of the superconducting iron oxypnictides. / Raghu, S.; Qi, Xiao Liang; Liu, Chaoxing; Scalapino, D. J.; Zhang, Shou Cheng.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 77, No. 22, 220503, 11.06.2008.

Research output: Contribution to journalArticle

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